Mechanism Of Human Eye . The human eye is one of the most valuable and sensitive sense organs. It enables us to see the wonderful world and the colours around us. On closing the eyes, we can identify objects to some extent by their smell. taste, sound they make or by touch. It is, however, impossible to identify colours while closing the eyes. Thus, of all the sense organs, the human eye is the most significant one as it enables us to see the beautiful.. colourful world around us. The human eye is like a camera. Its lens system forms an image on a light-sensitive screen called the retina. Light enters the eye It forms the transparent bulge on the front surface of the eyeball as shown. The eyeball is approximately spherical in shape with a diameter of about 2.3 cm. Most of the refraction for the light rays entering the eye occurs at the outer surface of the cornea. The crystalline lens merely provides the finer adjustme...
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